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<div class="subject-header">Proxy Editing</div>

<p>
Proxy editing is a method of editing in which original media clips are presented on timeline by proxy clips.

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<h3>Rationale</h3>
<p>
There are two main reasons to use proxy editing:
</p>
<ul>
<li> Original media from which the program is edited makes too high demands for either disk bandwidth or CPU processing power for decoding to enable responsive editing </li>
<li> Original is kept on network server, slow external disk or other media with restricted access and does not enable provide responsive editing if accessed directly.</li>
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<h3>Generic Proxy Editing workflow</h3>

<p>
All proxy editing workflows have the same phases:
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<ol>
<li> Render proxy media from original media </li>
<li> Replace original media with proxy media </li>
<li> Edit using proxy media </li>
<li> Replace proxy media with original media </li>
<li> Render final program using original media </li>
</ol>

<h3>Flowblade proxy editing</h3>
<ol>
<li> Creating Proxy Media
	<ol>
	<li> Select <b>Project->Proxy Manager</b> in menu and set proxy file settings in <b>Proxy Encoding</b> area  </li>
	<li> Select Video Media files in <b>'Media'</b> Panel</li>
	<li> Press button with proxy file icon next Delete button in 'Media' Panel</li>
	<li> If Project is already in <b>'Using Proxy Media'</b> proxy mode, timeline clips with original media that had proxy media rendered to will be replaced with proxy media immediately</li>
	</ol>
</li>
<li>Converting to use Proxy media
	<ol>
	<li> Select <b>Project->Proxy Manager</b> to open Proxy Manager</li>
	<li> Press <b>Use Proxy Media</b> button</li>
	</ol>
</li>
<li>Editing with proxy media
	<ol>
	<li> Clips that use proxy media have a blue stripe indicating that status</li>
	<li> A proxy editing indicator icon is displayed at left bottom corner</li>
	<li> If new proxy media is rendered timeline clips using the original media in question will be replaced with proxy media immediately</li>
	<li> Project can be saved normally and converted after load to use original media</li>
</li>
</ol>
<li>Converting to use Original Media</li>
<ol>
<li> Select <b>Project->Proxy Manager</b> to open Proxy Manager</li>
<li> Press <b>Use Original Media</b> button</li>
</ol>
</ol>
<h3>Important notes about Flowblade proxy editing</h3>
<div class="important">
<li> <b>DESTROYING ANY MEDIA while doing proxy editing WILL PREVENT CONVERTING BACK TO USING ORIGINAL MEDIA</b> </li>
<li> <b>It is only possible to use all <i>existing</i> proxy media and clips or all original media</b>. It is not possible to use only some of the created proxy media.</li>

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<div class="note">
<p>
Flowblade uses a programming technique that changes the paths used by media items and clips to point either to hidden proxy media or original media.
</p>
<p>
 Changing from one to another is implemented by writing a hidden temporary project file to disk and replacing paths when project is read back. Because of this any missing original media makes conversion back to using original media fail.
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